When using the rank wise college predictor, if it is again asking for payment despite your earlier payment of 800, it usually happens because the system does not recognize your previous transaction. To avoid this, make sure you are logging in using the same email ID that you used while making the payment. Using a different email or creating a new account may prompt the system to request payment again. Always verify that you are on the correct login page and email account to access the predictor without additional charges.